ptfe septa

Ptfe silicone septum for vial caps
Size: can be customized
Can be pre-slit for needle easy to puncture

Hplc Vials Septum
Red PTFE White Silicone Septum
Septum Size: 11*1mm

Pre-slit ptfe/silicone septa
Diameter: 8mm, 9mm, 10mm, 11mm
Thickness: 1mm, 1.5mm

PTFE / Silicone Septum with Pre-slit 
in order to pierce easily
Diameter: 8mm to 22mm
Thickness: 1mm, 1.5mm, 3mm
Packing: 100pcs/pack, Inner PE bag; Standard Carton outside

Aijiren uses Silicone and PTFE to produce Septa suitable for Autosampler Vial. Aijiren will compound PTFE and Silicone together in a binder-free compounding method. This Septa is softer and suitable for automatic injection needle puncture. Before laser cutting, there is a process, which is to dry in the dryer to dry the moisture in the raw materials, so as to ensure the texture and application of Septa.

The Septa produced by Aijiren is suitable for Autosampler Vials. Septa is to help Autosampler Vials to seal. The design of Cap with Septa facilitates the sampling of autosamplers. Aijiren, as a manufacturing enterprise, also requires Autosampler Vial accessories, Cap with Septa. It is produced carefully, using first-class equipment and exclusive craftsmanship. In the picture, Septa is drying.

Aijiren’s 20mm headspace vial is a popular product of Aijiren, and its corresponding Aluminum Cap with PTFE/Silicone Septa is also a popular product of Aijiren. It is precisely because of Aijiren’s excellent quality and favorable price that Aijiren has become the most well-known chromatography in China. One of the manufacturers of consumables.

Aijiren is a production-oriented enterprise with its own production plant and production workshop. Aijiren is committed to producing Autosampler Vial and its supporting Cap with Septa. Aijiren uses high-quality raw materials to produce Septa. The raw materials are free of impurities and pollution. They are processed in a dust-free workshop. Customers can buy with confidence, Aijiren supports factory inspection, welcome to Aijiren.

Aijiren’s septa can choose whether to have pre-slit or not. The pre-slit pattern is divided into one-shaped and cross-shaped. The septa with pre-slit is better to be pierced, especially for blunt automatic injection needles. , The cross star pre-slit septa can guide the automatic injection needle to accurately enter the vial to suck liquid, and will not deviate from the direction and cause the automatic injection needle to poke on the vial and cause the via to rupture.

But for autosamplers with blunt autosampler needles, Aijiren still recommends buying septa with pre-slit, because this can prevent the septa from being pushed into the vial by the autosampler and contaminate the sample. Septa with pre-slit can complete the function of guiding the automatic injection needle.

The septa produced by Aijiren uses high-quality raw materials. The raw materials are softened and heated into a mold into a shape with the same size and size. Then, a unique process is used to combine Silicone and PTFE, and finally cut and cut into a size suitable for Vial. . Aijiren, as a rubber factory, has enough experience and strength for Septa’s quality assurance.

Aijiren adopts septa’s automated production, which guarantees Aijiren’s batch and efficient production. It is precisely because of this production that Aijiren has become a chromatographic consumable supplier in more than 200 regions around the world. If there is any need for chromatographic consumables, please Contact Aijiren.

Septa-silica gel has strong repetitive sealability, and it can maintain good close performance after multiple injections; PTFE is a material with better chemical conditions at present, and it can withstand strong acids and alkalis. The two materials After compounding, the bottle can be used for various laboratory purposes such as sealed sampling, chemical storage and so on.

PTFE is the most inert, but it has poor resealability, so it is not suitable for multiple injections or storage. For layered septa (such as PTFE/silicone), the chemical resistance of the septum is PTFE until the septum is punctured.

PTFE-fused septa are suitable to overcome the degradation, which happens due to prolonged high temperatures, commonly observed in silicone rubber septa. The degradation results in baseline drift and additional peaks. It is generally fixed with the PTFE face towards the column packing.

The butyl septa on the PTFE surface can be used in the headspace sample bottle to evaluate the injection activity and the penetration efficiency of methyl bromide on the activated carbon. The septum can be used to seal the vial during liquid sample collection for unmodified benzene analysis using HPLC method

When selecting a vial septum, septum compatibility with the sample and solvent or chemical resistance are the main considerations. Except for poor sealing, others are not suitable for multiple injections or storage. For layered septa, such as PTFE/silicone, chemicals with sample/solvent, so the chemical resistance of silicone should be considered when using these septa.

The non-pre-slit septas help to reduce carryover from vial to vial because the resealing characteristics of the septum act as a squeegee to wipe solution from the outside of the needle. Typically, a non-slit septum exhibits resealing capabilities for a limited number of needle punctures but for long-term storage in the vial, using a new non-punctured septum is best practice.

Chromatography septas can be pre-slit or not and must be considered by evaluating a few factors. A pre-slit septum is an ideal choice in applications requiring 20% or more of the sample injection each time from the vial so that suction is avoided.

Aijiren’s 20ml Headspace Vial has a specification of 22.5*75mm. It has two colors, clear and amber. The glass type of precision screw headspace vial is 5.0 type, but 20ml clear precision screw headspace vial has a type with or without label area.

Aijiren’s 18mm Screw Top Headspace Vial is available in 10ml, 20ml, amber glass and clear glass. And the caliber of Headspace Vial is Screw thread, which is convenient for sealing and opening the headspace bottle. At the same time, the Screw Top Cap of Aijiren’s Headspace Vial has a center hole, which is convenient for the automatic injection needle to enter and exit. The thickness of Septa is easy to pierce and has a tight seal.

PTFE is the most inert but its poor resealability making it unsuitable for multiple injections or storage. For layered septa such as PTFE/silicone the chemical resistance of the septa is that of PTFE until the septum is punctured. Once punctured, the silicone layer is exposed and able to react with sample/solvent so the chemical resistance of silicone should be considered when using these septa.

HPLC sample vial Septa is one of the most important part in chromatography consumable. Septa for HPLC has high temperature resistance and corrosion resistance. Quality and service in a controlled production environment is trusted by customers. The Caps are made of high quality polyproylene to exact manufacturing tolerances and lined in a controlled manufacturing environment, The color of the #HPLCvial cap can be customized according to customer needs. Aijiren’s septa use only the highest quality materials to ensure proper function and can be pre-slit to ease needle penetration.